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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1292 Important: kernel-rt security, bug fix, and enhancement update 13 May 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Red Hat Enterprise Linux WS/Desktop 7 Impact/Access: Root Compromise -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2015-3331 Reference: ESB-2015.1137 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-0981.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security, bug fix, and enhancement update Advisory ID: RHSA-2015:0981-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0981.html Issue date: 2015-05-12 CVE Names: CVE-2015-3331 ===================================================================== 1. Summary: Updated kernel-rt packages that fix one security issue, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64 3. Description: The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. * A buffer overflow flaw was found in the way the Linux kernel's Intel AES-NI instructions optimized version of the RFC4106 GCM mode decryption functionality handled fragmented packets. A remote attacker could use this flaw to crash, or potentially escalate their privileges on, a system over a connection with an active AEC-GCM mode IPSec security association. (CVE-2015-3331, Important) The kernel-rt packages have been upgraded to version 3.10.0-229.4.1, which provides a number of bug fixes and enhancements over the previous version, including: * Audit subsystem not resolving path name on directory watches * audit watches do not track correctly after a rename * auditctl output is changed in RHEL 7 * megaraid_sas: non-booting system with intel_iommu=on kernel parameter * GFS2: kernel NULL pointer dereference in gfs2_inplace_reserve * Crypto adapter cannot be brought online - affect all HW * crypto/seqiv.c: wrong check of return code from crypto_rng_get_bytes * Backport crypto: sha256_ssse3 - also test for BMI2 * Null pointer at team_handle_frame+0x62/0x100 [team] * AES CTR x86_64 "by8" AVX optimization * Intel RDSEED - Fix for entropy counting * Intel SHA1 multi-buffer crypto implementation * Intel SHA1 AVX2 optimization support * mlx4_en: HW timestamp ends up in error queue of socket which does not have SO_TIMESTAMPING enabled (BZ#1209963) This update also fixes the following bugs: * Prior to this update, heavy lock contention occurred on systems with greater than 32 cores when large numbers of tasks went idle simultaneously. Consequently, all the idle CPUs attempted to acquire the run-queue (rq) lock of a CPU with extra tasks in order to pull those run-able tasks. This increased scheduler latency due to the lock contention. Instead of each idle CPU attempting to acquire the run-queue lock, now each idle CPU will send an IPI to let the overloaded CPU select one core to pull tasks from it. The result is less spin-lock contention on the rq lock and produces improved scheduler response time. (BZ#1210924) * The CONFIG_NO_HZ logic enabled/disabled the timer tick every time a CPU went into an idle state. This timer tick manipulation caused the system performance (throughput) to suffer. The CONFIG_NO_HZ configuration setting is now turned off by default, which increases the throughput due to the lower idle overhead while allowing system administrators to enable it selectively in their environment. (BZ#1210597) All kernel-rt users are advised to upgrade to these updated packages, which correct these issues and add these enhancements. The system must be rebooted for this update to take effect. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1209963 - kernel-rt: rebase tree to match RHEL7.1.z source tree 1213322 - CVE-2015-3331 Kernel: crypto: buffer overruns in RFC4106 implementation using AESNI 6. Package List: Red Hat Enterprise Linux Realtime (v. 7): Source: kernel-rt-3.10.0-229.4.2.rt56.141.6.el7_1.src.rpm noarch: kernel-rt-doc-3.10.0-229.4.2.rt56.141.6.el7_1.noarch.rpm x86_64: kernel-rt-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-debug-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-debug-devel-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-debuginfo-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-devel-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-trace-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm kernel-rt-trace-devel-3.10.0-229.4.2.rt56.141.6.el7_1.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2015-3331 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFVUmfyXlSAg2UNWIIRAs8AAKCJ8KEowk5nwRonwGvEgOgjZXKgEACgvOHo 6UW1vdg5XM/o7OCxkfY7gLo= =uvqw - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVVKhUBLndAQH1ShLAQL/Yw/9FuSMHAS79/gMbSbYKM9CpHLkkSPEhjF+ L9PBZ5vRbKihWfMR3GiRCCodYaKMW3zwtDpWLgr2uFnVqGUa0TKJ3c7Us5L78Mdu 2tt+wR/4zKDuKwmkk1uNq5ViqYPPWj8QjJ1qMZ260RIO/CVueAUwvzq+oq+XMjl8 fvqllASUGkm9i5m8LQretI2Hl11rKJj7Aaw816sUjmM+o2bXuXCZt174mehXgtFZ rcUainUIWmlDl7YHngxWF/wYqPsIVU6ChC2S1w0DxZELX7Nha+DDLxMxgUsOnYsO 6KHxFoHqh6bEj4VI6d0/8vgO5+0cD/LV/lblQksBWOFYalG5vQvMqKJgkQ9nWq96 0a3J6IilP/p9deCEbq42PfFduKWqHFJC+OnCjTHfz3pyRfarotwvGohXLUwD7zjB jq1NvFmrsY4M9MZY1loE7qpG1OPsTkjBJHzYixgf1hcQ85RQt4+0ehGgwuvMdD3o Z0lTSC70V4H9G0QMCNKKcCvyU6dtPXAu8lcvAbVvkcfnZNjZsv3zjq4OQEdpqh+T lnC2W/y0iLXbC7klc+5zy7/GkjMfCHWnpqErVeUWSW9jCNLSLELfU1sRFTlG9Rfl 3Gy5P54LqfsZGMWuABSd4HC/mKGv25SKprODtFTZ8XEA5Ns5/247UucpQTpljZ8Q viK6SqYr02E= =jGRO -----END PGP SIGNATURE-----